Device for clearing cylindrical rook drills



(o Model.) l

. BALL.

DEVIGVEFOR GLEARNG GYLINDRIGAL ROOK DRILLS. No. 256,790. atentedAp1.18,1882.

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UNITED rares i literatur Carica ALBERT BALL, (')F CLAREMONT, NEWHAMPSHIRE, ASSIGNCR TO THE SULLIVAN MACHINE COMPANY, OF SAME PLACE.

DEVICE FOR CLEARING CYLlN-DRICAL ROC KDRILLS.

SPECIFICATION forming part of Letters Patent No. 256,790, dated April18, 1882.

Application led December 6, '1881. (No model.)

To all whom t may concern Be it known thatl, ALBERT BALL, of Claremont,in the county of Sullivan and State ot' New Hampshire, have invented anew and Improved Device for Clearing Cylindrical Rock- Drills; and I dohereby declare that the following is a full and exact description of thesame, reference being had to' the accompanying drawing, and to thcletters of reference marked thereon.

My invention relates to a simple and novel device adapted to be used, inconnection with a cylindrical drill for boring roel; or other niaterial,for the purpose of preventing the core from being withdrawn with thedrill-rod from the hole; and, further, to serve as a convenientandsuitable means for conveying water or other liquid or air or steam tothe drill or cutting head into the hole being bored to prevent the saidcutting head orbit from heating, and to wash or force out and carry awaythe detri- 'tus accumulating by the boring process in order tofacilitate the proper action of the drill; and the invention consistsprincipally in providing the drill-rod with a pipe or rod passing.

i or rod a block or nut of suitable size and masection of a drill-rodwith my invention shown in connection therewith.

A represents the cylindrical drill-rod, of ordinary construction,provided at its lower end with the drill or bit B, and at its upper endwith a stufngbox, C, provided with a lubricatingchamber, a, which may belled with any desirablelubricant suitable for the purpose.

Passing longitudinally downs through the center of the stufiing-boXC andthe drill-rod A is a pipe or hollow rod, D, for the conveyance of wateror other power through the drill-rod to the hole being bored. The lowerend of this pipe or hollow rod D is screw-threaded to receive a block ornut, E, to be secured thereon, 'while the upper end passes through thestuft'- ing-boX C and framing F, (in which itis rigidly securedby anysuitable 1neans,) to be'attaehed to any desirable or convenient devicecapable of supplying the requisite power. This rod or pipe should so fit'the stuffing-box C as to permit it (the stutng-box) and the drill-rodto which it is secured to traverse freely over it.

The block or nut E, hereinbefore referred to, may be made of anydesirable material possessing necessary strength and durability, but isrequired to be of a shape conforming with the drill-rod, and ot' adiameter and size sufdcient, when secured to the end of the pipe orhollow rod D, to leave a small space or channel, b, between its outersides and the inner walls of the drill-rod to permit the free passage ofwhat water or other power that may come from the outlets or perforationsc, made in the pipe or rod D a short distance above the said block ornut E, as shown; also, to leave a small space, d, between the undersurface ot' the block or nut E and the points of the drill to preventthe said block or nut from interfering with the rock or other materialduring the process of boring.

Its operation is as follows: When the drillrod(which may be operated byany of the wellknown devices employed in this class of machinery) isadvanced the pipe or rod I) and its block or nut E remain stationary,(by the formers fixture in the framing F,`) in consequence of which thedrills progress is limited to the space between tl'ieundersurface of thestuffingboXC and the upper surface of the block or nut E, the lattertherefore acting as an obstruction or stop to the further progress ofthe drill by the formers contact therewith. When the drill is withdrawnthe tendency of the core of the material being bored is to come with it;but such is obviated by the block or nut E pressing on the top surfaceof the core and't'reeing it from the drill,thus preventing the core from'clogging the same, as is frequent with other drills. r)She detritus orsmaller particles accumulating` by the boring process are removed by thewater or other power conveyed by the pipe or rod D to the hole.

B y the foregoing description and the accompanying drawing theadvantages and usefulness of my device will readily be perceived uponperusal and inspection by those well versed in the art to which itrelates. Its construction and arrangement of parts are few and simple,and can Jtherefore be cheaply manufactured and easily applied to thedevice for which it is adapted. It is free from all friction by itsdesirable arrangement with the lubricant in the stuffing-box of thedrill-rod, thereby always assuring perfect and effective operation.

I am aware of the fact that hollow angers have heretofore been providedwith a pipe or pipes for the conveyance of water, steam, or other powerto the hole or oritce being drilled, and therefore do not wish tobroadly claim the employment of such in my device; but

What I claim, and desire to secure byLett-ers Patent, is-

l. In a cylindrical drill for boring rock or other material, thecombination therewith of a rigid pipe or hollow rod (for the conveyanceof water or other power to the hole being bored) provided with a nut orblock secured to the lower end thereof, substantially as described,shown, and for the purpose set forth.

2. In a cylindrical drill for boring rock or other material, thecombination, with the pipe or hollow rod l), provided on its lower endwith nut or block E, substantially as described and shown, of theperforations c and passage b, respectively, for the outlet and passageof water or other power to the hole being bored, substantially1 asdescribed, shown, and for the purpose set forth.

This specication signed and witnessed this 18th day of October, 1881.

ALBERT BALL.

Witnesses z F. A. BALL, O. B. RICE.

